1 2/* 3 * Copyright 2011 Google Inc. 4 * 5 * Use of this source code is governed by a BSD-style license that can be 6 * found in the LICENSE file. 7 */ 8 9 10#include "SkPixelXorXfermode.h" 11#include "SkColorPriv.h" 12#include "SkReadBuffer.h" 13#include "SkWriteBuffer.h" 14#include "SkString.h" 15 16// we always return an opaque color, 'cause I don't know what to do with 17// the alpha-component and still return a valid premultiplied color. 18SkPMColor SkPixelXorXfermode::xferColor(SkPMColor src, SkPMColor dst) const { 19 SkPMColor res = src ^ dst ^ fOpColor; 20 res |= (SK_A32_MASK << SK_A32_SHIFT); // force it to be opaque 21 return res; 22} 23 24void SkPixelXorXfermode::flatten(SkWriteBuffer& wb) const { 25 this->INHERITED::flatten(wb); 26 wb.writeColor(fOpColor); 27} 28 29SkPixelXorXfermode::SkPixelXorXfermode(SkReadBuffer& rb) 30 : INHERITED(rb) { 31 fOpColor = rb.readColor(); 32} 33 34#ifndef SK_IGNORE_TO_STRING 35void SkPixelXorXfermode::toString(SkString* str) const { 36 str->append("SkPixelXorXfermode: "); 37 str->appendHex(fOpColor); 38} 39#endif 40